Metal cutting machine and control system therefor



April 18, 1933. 1,904,975 7 METAL CfiTTING MADHINE AND,CONTROL SYSTEM THEREFOR w. F. B Bco'cK 8 Sheets-Shet 1 Filed Oct.' 25, 1930.

gwumtov dummy 9 w. F. BABcocK METAL CUTTING MACHINE AND CONTROL SYSTEM THEREFOR Filed Oct. 25, 1930 8 sheets-sheet 2 w w w abtozmqa A ril is, 1933- 1,904,975

METAL CUTTING MACHINE AND CONTROL SYSTEM THEREFOR W. F. BABCOCK Filed Oct. 25, 1930 8 Sheets-Sheet 5 1 8, w. F. BABCOCK METAL CUTTING MACHiNE AND CONTROL SYSTEM THEREFOR Filed Oct. 25 1950 dwff ahw A ril 18, 1933. BABCOCK v 1,904,975

METAL CUTTING MACHINE AND CONTROL SYSTEM THEREFOR lll llll 18, w. F. 4 b

METAL qu'b'rme cams AND CONTROL sysmu THEREFOR Filed o1.'25, 1930 8 s eets-Sheep" 7 w, ww zap/ Fatenteri Apr. 253, x 39353 UNITED STATES PATENT OFFICE.

mum r. BABCOCK, or nn'rnorr, mcmem, assrenoa '10 ran roorn-Bua'r comrm, or cnnvnmnn, 01110, A conroimrron or 0310 METAL CUTTING MACHINE AND CONTROL SYSTEM THEREFOR Application filed October 25, 1930. Serial No. 491,174.

The general object of this invention is to provide an automatic machine tool by which a large number of different operations may be performed on a given piece of work in a shorter period of time than by the use of revious achines adapted for similar uses. pecificall an object is to provide a boring or drilling machine of the multiple-head type by which a number of drilling, counter-sinking and like operations may be performed with relation to various surfaces of a piece of work, in a definite order, but requiring only one initiating operation on part of the attendant or operator.

An object is to provide -a metal cutting machine by which intersecting cuts may be made in a piece of work and in which the feed of the cutting tools will be adjustable in such manner that one toolwill be automatically retracted fromthe point of intersection before another tool reaches such point.

More specifically, an object is to provide an improved multiple spindle drilling machine which will have a plurality of substantially inde endent tool carrying and operating hea s, independently movable in respective planes, all under a smgle control system.

Further objects include the provision of an improved, novel and eflicient operating system for a multiple-head machine tool. Another object is to provide amachine tool in which one or moretool supporting heads will have respective efligient and flexible power plant units supported thereby and movable therewith at all times.

Further objects and features of the invention will become apparent from the following description, relating to the accompanying drawings, which show a preferred form of machine incorporating the invention. The essential characteristics are summarized in the claims.

I In the drawings, Fig. 1 is a side elevation tool supporting and driving heads; -Fig. 2 is a plan view thereof, showing two additional heads in broken, lines; Fig. 3 is a se tional :f.;, .w of one of "the heads substantially according to the line 33 on Fig. 1; Fig. 4 is a sectional view of one of the heads substantially according to the line 44 on Fig. '2; Fig. 5 is asectional plan view through one of the heads, according to the line 5-5 on Fig. 3; Fig. 6 is a detail sectional view of a pump mechanism taken along the lines 66 on Figs. 3 and 5; Fig. 7 ,is a fragmentary side elevation of a portion of the control mechanism of one of the heads; Fig. 8 is asectional'view thereof substantially according to the line 88 on Fig. 7; Fig. 9 is a detail view according to the line 99 on Fig. 1, and Figs. 10'

and 11 are work and tool diagrams.

3 slidably carrying respective tool supp rt- 85 ing and driving heads 6 and 7, and an upstanding frame member or column 8 having a guideway 9 for carrying a toolporting and driving head 10. The heads 6, and 10 are, as shown, substantially alike and, in general, the description below directed particularly to the head 10 will suflice for all these heads. As shown in Fig. 2, two additional heads and guiding supports are shown dia grammatically at 12 and 13. i I 7 Bearing in mind that each of the heads are substantially alike, these comprise,- main frames 20, preferably made up of-suitable castings, and arranged to support electric motors 21, spindle-driving gearing 22 (Fig. 3) with spindles 23 for tools t, t and t" respective to the various units, and a pump unit 24,

all .of which generally described parts will be hereinafter more fully described.

The pump mechanisms are of a generally known type, (see U. S. Patent 1,485,595, for example) but specifically adapted for the purpose of the present invention. These pumps are driven from the respective motors 21 and operate as variable speed gearing dealso relatively rapid, in order to work is accomplished,'thepumps operate to; automatically reverse the direction of movement, of the heads, and the return speed of the heads to starting position is preferably speedup the production of the machine. The means whereby the above stated objects are carried out, and the various outlined operations performed, will now be described in detail, but with reference particularlyto the head 10, its upright support and associated mechanisms.

The character of the various members comprising frame 20v of the head is best understood withreference to Figs. 1, 3 and 5. There is atmain or central housing section ranged to deliver oil under pressure alternately below and above the piston to raise and lower the head as desired. The piston cylinder indicated at 55, is supported between upper and lower brackets 56 and 57 on the 7 housing section 30, which extend into the confines of the column 8 which is madehollow, as shown in Fig. 5. The brackets are secured in the usual way to the housing section 30,

der is shown 1 30, directly supported on the guideway 9 asshown in Fig. 5, this housing member having machined surfaces at 31 and heavy plates or strips 32 forming a dovetail channel. 1 The machined surfaces and plates 32 embrace oppositely extending machined flange formations 33 on form the'guideways -At one end of the the column 8, which flanges 33 housing section 30 (the lowermost'end with reference to the head 10) is a spindle; drive gearing housing 35, which contains and supports the spindles 23 and associated parts. As shown, by way of ex-- se a mainample, .these parts compr1 driving gear 36, spindle gears 37 and 38, one meshing tween the gears 37 and an idlerv ear 39 beand 38. A greater or lesser number ofspindles may be provided on the various heads as will be' obvious.

Surmounting the housing section 30, as

with the gear 36,

' shown in Fig. 3, there is a bracket member 40, the lower wall 41 of which, forms a cover for the housing section 30, through which the drive shaft 42 of a suitable motor 21, supported on. the bracket 40, extends. This shaft 2 carries a gear 43 disposed within a suitable oil casing provided partly by reason of a horizontal partition 45 in the housing section 30. The gear 43 in turn drives a larger gear 46, also disposed in the oil easing just mentioned, and this larger gear, through the intermediacy of a vertical shaft 47 drives the previously mentioned gear 36 of the spindle gearing mechanism shaft 47 has suitable bearings 48 and 49, (13.1.

- porting cable ried by the partition member 45, and a brack-- et formation 50, located intermediately of the ends of the housing section 30. Incidentally, the pump unit 24 m bracket formation 50, as will be seen from Fig. 3.

For raising and lowering the head 10, by

7 means of the oil gear 24, which is operated from the shaft 47, as will be presently shown,

' I provide a fixedpiston, operating in 9. cylinder that is mounted on the housing-section 30, and arranged to extend parallel to the movement of the head on its guideway. The pump, as will be hereinafter shown, is aray also be carried on this and may be drawn toward each other to seal the ends of the cylinder and'hold it in place,

as by means of vertical clamping and securing rods, the positions of which are shown in Fig. 5 at 59. The piston within the cylinn Fig. 4 at 60, and its connection to the column 8 comprises simply a cylindrical heavy shaftor rod 61, extending through suitable passages 62 in the bracket 56, forming one of the cylinder heads, the upper end of the piston rod 61 being rigidly secured to the column in any suitable manner. Reference is directed to the bracket member 63 associated with the guideway 3,

3, 5 and- 6 parti which illustrates a suitable meansfor securing the piston rod 61' tothe base 1, which same device may be used in connection w th the upright column 8. I As shown in Fig. 4, there are conduit lines 65 and 67, including suitable passageways 65? and 67 in the respective bracket members 57 and 56, which conduct oil from the pump 24 "to the opposite ends of the cylinder 55. These conduits 65 and 67 of course,

lead from the delivery means of the pump, which Will be hereinafter described.

grooved wheels 76, with the housing section 30.

Referring now to the pump 24, (see Figs.

this pump'has a generally box-like casing 76 suitably closed on all sides, to contain an cularly) it will be seen' that adequate supply of oil. The top wall of the casing-has an enlarged tubular formation at 85, through the walls of which portions of the conduits 65 and, 67 extend. Rigidly supported within the formation 85 is a heavy pintle 86, recessed to form continuations of the conduits 65 and 67. As shown,.the pintle contains two pairs of ducts 92 and 93,one pair, 92, communicating with the conduit 65, the other-pair with the conduit 67. Suitably carriedl'for rotation on the inwardly extending end of thepmtle 86 is a generally cylindrical barrel, having generally radially extending cylinder bores, the inner ends of which periodically communicate with the ducts 92 and 93. The cylinder bores are indicated at'95, and are arranged radially in pairs. Each cylinder bore has a port at 96, which is brought into communication with one or the other pair of ducts, S12 and 93, during rotation of the barrel. A piston 97 is plate 99, in order to prevent free lateralv suitable bearings 102 and 103 in a cradle .104,

mounted to rock about a pintle 105 secured within the. upper part of the casing 7 6. Ro-

tation of the impelling "ring 100 is effected through a-drive shaft 106, keyed thereto and z extending outside of the oil gear casing.

This shaft, 5 as shown, carries a suitable sprocket gear 107 connected as by means of pelling ring is concentric with the pintle 86,

a suitable driving chain 107 to a sprocket 107" on'the shaft 47. Incidentally, the shaft 106 may also carry a sprocket 108 for driving an oil pump 109 to actuate a piston (to be later described), which-moves the cradle 104 to its'various operating positions.

It will-be seen'that when the cradle 104 is in an intermediate position, so that the imrotation of the impelling ring will cause the pistons 97 to travel about the pintle 86 without reciprocation within their respective cylinders 95. In this position, no liquid is delivered/by the pump. By rocking the cradle in one direction or another, from a neutral position, such as just stated, the i-mpelling ring will be made to assume an eccentric p 0 sition with respect to the pintle, a-nd by its rotation'cause a reciprocation of the pistons within their cylinders, thus causing the production of a steady flow of liquid inopposite upon the extent and direction of directions throughthe pairs of ducts 92 and 93, at a rate and in a direction dependent eccentricity of the impelling ring. i

For actuating and controlling the cradle 104, I have shown a plunger 110, connected through links 111, with the end of the cradle opposite the pintle 105, as indicated at 112.

The plunger 110 is actua ed by a piston 113, mounted in a cylinder .114 within the oil gear casing. Movement of the piston 113 is controlled by a pilot valve 115, reciprocably mounted within ,the plunger 110, and provided with a valve stem 116, extending longitudinally of and beyond the plunger. The

arrangement is such that when the pilotitiateand operate the pumps, I provide a sys-' tern of controls, including individually set pressure is applied to one or the other side of the piston 113 to cause the plunger 110 and cradle 104 to'shift in a corresponding direction, to an extent dependent upon the extent of movement of the pilot valve.

As has been previously set forth, all of the heads are controlled for their reciproeating movement toward and away from the work by substantially identical, means, including the pump 24, associated with each head. It has beenshown that the oil gears are driven by therespective motors 21 through suitable driving connections. To intable' cams, adjustably positioned on the main frame parts, and pump controlling devices actuated thereby.

Description of the various parts of one of these mechanisms just outlined will suflice for all, since they are identical with certain exceptions, which will be hereinafter .brought 01 113.

The link v116, see Figs. v and 8,.which operates the pilot valve 115 to thus control the pump, is conne'ctedthrough the wall of the housing section with an operating lever in the nature of a bell crank 120. This may be mounted on a suitable bracket 121 attached to the housing section 10. The bell crank 120 has an outwardly extending arm 122 provided with a handle 123 by which the bell crank maybeoperated manually in case of emergency, such as jamming of parts or stopping of the heads in the wrong or abnormal positions,

Slidably mounted in the bracket 121 is a control bar 125 having pin and slot connection with the arm 122 at 126. The bar 125 is initially moved 'tothrow the pump from a neutral position into aforward driving position by an arm .128 splined to a shaft 130. The arm 128 slides on the shaft 130 and is embraced by suitable ears 131 on the bracket 121, the earsbeing positioned above and below the arm 128. The-arm 128 has a lost valve 115 is shifted in eithe r direction, fluid motion connection by reason of a slot in the i 8), by operation of the arm 128. against the abutment surface 132; This will cause the valve, piston to assume t e position shown in Fig. 5, at-which position the head is driven downwardly at its highest speed.

Referring npw to Figs. 1, 7 and 8, it may now be seen that just before the foremost tool If contacts with the Work, a suitable cam 13 adjustable on a fixed support 136, at the side of the column, coacts with a suitable roller 137 on the bar 125' to move the above stated the tool.

p as shown in Fig. 7,

- surface at 125.

justably arranged as by means of @125 to such. position that'the pump will control connections to slow down the operation of the pump and to thereby slow down the head to the desired working progress of Now, continued downward movement of the head is which serves to move the bar 125 to its extreme right-hand position (referring to Fig. which movement causes the pump valve mechanism 113 to be shifted to a position which causes the pump unit to reverse the direction of movement of the head and at the greatest speed the pump is capable of. The latch and trigger mechanism, ust mentioned; is shown best in Figs.

projects outwardly from the bracket 121, providing an end abutment Suitably arranged "on the side of the head is a trip hammer 140, pivoted as at 141, the upper end of which is ada screw 142 to engage the surface 125'. In order that the hammer will give the bar a percussion blow when released, the member 140 is stressedtoward the bar, as by a suitable spring 143, connected between the mem ber 140 and the bracket 121. Swingably mounted below the hammer 140 is a trigger 145, the left-hand end of which, as shown in Fig. 7, has a latch 146 engaging a cooperating latch 147 on the lower end of the hammer 140. The trigger is normally swung to hold the latch devices just described in engagement with each other, as by a suitable spring arrangement 148. The right-hand end of the trigger 145, as shown in Fig. 7, is positioned to engage a suitable stop 150. The stop 150 is adjustably positioned on the cam support 136 and extends outwardly beyond the various cam members, as shown 1n Fig. 8, in order that the trigger will pass all the cams.

that as the head reaches a It will be seen predetermined lowermost position, the lower end of the cutting stroke, the trigger is moved to release the latch 147, causing the instantaneous action of the hammer 140 by reason of the spring 143. This moves the bar 125 to the extreme right-hand position (referring to Fig. 8), thereby causing the return move- As a precaution measure, in the even tthe latch and trigger mechanism failsto operate for 'anyreason, continued movement of the head past the releasing position of the latch and trigger, will bring the roller 137 into contact with a cam member 152'on the support 136, which will positively move the bfir e the V ment of the head.

thrown into neutral, thereby stoppin g head. Thereafter, the operator may, by reason of the manual control member 123, operate the head to advance or retract it at the desired speed.

' -Assuming the trigger. and latch mechanism has properly functioned as described, the

limited by a latch and trigger 1, 7 and 8. The bar,

at the end of the working stroke of the head,

by reason of turning the shaft 130, as will be presently described, to. again, start the head downwardly to perform its operation on a new piece of work..

It will be seen that turning of the shaft 130 in a counter-clockwise direction (Fig. 8) will, by virtue .of the arm 128 engaging the abutment surface 132, move the bar 125 to restore the hammer 140 to the position shown in Fig. 7 The trigger arm 145has been retained in its normal position bya suitable stop 155 positioning the hammer 140, the latch members 146 and 147 simplycam over each other, as the right-hand.v end of the trigger 145 is lifted off the stop, the-trigger being then swung back to the latching position shown in Fig. 7 by the spring. v

The shaft 130 is supported at its lower end in a suitable bracket 160 on the'column 8 and .is connected byv a suitable parallel motion virtually identical with those on thehead 10,- above described in detaiL.

The shaft 163,- upon movement of the arm 165, turns a horizontal shaft 166 through a bevel gearing167 in a suitable cage or support 168 on the base 1. The rocking motion of the shaft 166 is transmitted to the bar 125 ofthe head 7 through a parallel motion connection 161', essentially similar to that shown in Fig. 9, except that the operating handle 165 which is associated with the parallel motion linkage 161 is omitted.

To transfer the rocking motion of the shaft 166 to the control bar 125"- (Fig. 2) of the head 6, I may provide a connection means, including a downwardly extending arm 170 on the shaft 166, an upwardly extending arm 172 on the shaft 130" of the controlling mechanism of the head 6, and a link 171 connecting the two arms. The linkage described is such that the rotation of the shaft 130" will cause the movement of the lever 128 of that unit to It. may be mentioned here that the cylin ders 55, as heretofore described, have-been secured to their respective heads, while the side, in Fig. 10. The control assembly is pistons 60 are fixed to the frame of the maindicated at O for the head 6, C for the head The\ cylinders therefore travel on 7 and C for the head 10.

chine. I 7

For convenience, we may start with the settheir respective pistons. I find this construc:

tion is extremely advantageous in that it perting of the controls at C" for the head 10,

mits short leads from the pump to the cy1in this having the slowing down cam at 135, der and obviates the necessity for flexible conthe tri 150 f r th t igg d lat h nections which would be required were the h isms and the stopping cam 154, all positions of the cylinder and piston reversed. n d t t on th ll 137 as previously This greatly increases the efliciency of the d ib d, v v pump units by decreasingl e d to Assuming that the head 10 may be started age, which, since the press res 1n. the in its downward path with the cam roller 137 duits are comparatively great, are difficult to in th ition shown at a, it is, for the eliminate entirely. a

An advantage of the present ar g must-travel before it engages the cam135 to not heretofore mentioned is h h egl slow down? the speed of operation of the head, 6, 7 and 10 are, '01 may be, completely ldentlcal but uppose this movement requires units in construction, whereby any one of the heads f th l th h w t D i th di i may be substituted for another, SllbStBJlline roller be (jammed ver and tially no modification thereof. For this purth h d l d d t -ki d,

moment. unimportant how far this roller pose, the attachment devices 7 5' for the counwhich we have as'sumedis half of theinitial tear-weight cables 75 may be provided On al advancing speed, when it reaches the position the heads. Fig. 1 illustrates 'one of these hown at 6, adjacent the cam 135. The drill attachment devices formed on the maincast has now reached the work and subsequent ing section of this head. progress of the roller from the position b to It is, of course, understood that a suitable the position 0 is determined by thedepth it arrangement for supplying cutting lubricant is desired to drill the hole 0 This depth is provided. As shown, each head may 1!!- of hole having been determined, the operator elude. its own pumping system within the simply sets the trigger operating'device 150 casing sections 30 (see Figs. 3 and 5). The so that the movementof the roller 137 will be vertical shaft 47 carries a sprocket gear 180 reversed at position '0. It will be remembered which, through the intermediacy of a sultable that the-operation of the stopping device 150 chain 181 drives a gear 182, comprising the on the trig er mechanism is such that the bar essential driving member of a suitable concarrying t e roller 137. isthrown rapidly to stant pressure pump 185. This is suitably the right, carrying the roller to the position mounted within the casing section 30 and has 03 with reference to the cam support 136.

inlet and outlet lines 186 and 18 7 communicating with any suitable oil supply and suit-, the control diagram C", it will be seen that able discharge means (not shown) to direct the working stroke of the head 10, is approxithe cutting lubricant to the workand tools. mately 3 unitsDin distance. Now, in terms Referring nowto Figs. 10 and 11, it will be of time, and because the speed of the head 10 demonstrated how the various controls, iniis slowed down to half speed to bring the rolltiated by the" control linkages, including the er from position-b to the position a, this disstartingarm 165, may beset and operatedto tance from b to 0 actually represents, in terms perform work in a single operation, notwithof time..7 units. Assuming now that the trigstanding the fact that the paths of the cutger mechanism has engaged the stop 150, the ting tools intersect. In Fig. 11, the work W head now travels upwardly at full speed. At

there may also be a-transverse boreor hole may be considered as a block to be drilled a total time period of 12 units, the rollerwith openings at O, O and 0. Suppose, 137will be brought to the positioneshownin for example, the opening '0' has to be fultlines. This position e of the roller cor-- counterbored 'on a larger diameter. The respoaids to the position of the drill t! shown smaller opening 0' may be drilled with in full lines in Fig. 11, the drill moving in the tool t of the head7; the counter-bore may the direction of the arrow, shown adjacent be formed with the tool t of the head 6, and the drill. I

which opens into one or the other of the opention abovethe legend f0 (head 7) it will be ings O and O, which transverse hole may be seen that the tool 25 must be operated in such formed by one ofthe tools t on the head 10. manner that it will cut its hole 0 and back Now, for convenience, let us take the autoout before the tool t"-'. is'infinishing position,

matic control mechanisms, including the cams or the reverse must obtain, that is to say, tool and trigger operating devices of the various t" must have finished its work in the region heads and set these instrumentalitie's for perin which the holes 0 and O intersect. To

1 forming the operations just given. The three effect the firststated condition, the stop 135 setslof cam and trigger operating instrumenmay be located, as shown on the, intermeditalities are shown, fl r convenience side by ate portion of the diagram Fig. 10, so that the Referring now to the control dia ram'por-' distance from position a of the roller 137 to its position b will be 8 units. 'This is at full speed. The tool t, therefore, starts cutting the work as illustrated in Fig. 11 with the corresponding roller 137 in this position 6. Assuming now that the head travels two distance units at half speed (the equivalent of four units, in terms of time), the location of the end of the drill t at the end of 12% units (in terms of time) will be that illustrated at 0 in full lines in the diagram. Thus it will be seen that the drill t has reached its lowermost position and has backed up to the position shown in full lines before the workin end of the tool t has reached the position 0 the opening 0. The remaining positions of the roller 137 are material only in that they show the path of the roller as it goes -back-to starting position when the pump is thrown into neutral by the stop 154. These various positions will, therefore, not be describedin detail.

Referring now to the extreme right-hand part of the diagram above the legend C (head 6),-it will be.seen that the. counterboring tool .t, at approximately 8 units at high speed, will have reached the position b, carrying the end of the tool t into contact with the work as the speed of the head 6 is slowed down. Actually, sincecounter-boring with a considerably larger tool, requires a much slower speed of operation, .the cam 135 used in this case, moves the roller a much eater distance toward neutral than do the cams 135 shown in the other parts of the diagram. It may be assumed that the tool now moves at one-half the speed of the other tools for their working stroke or one-third of full speed, and a measured distance of one unit, therefore, requires, in terms. of time, four times that of a single unit D. It will therefore be seen that at the end of 12 units, measured in terms of time, the roller 137 will have reached the position 0 at the right hand side of the diagram, whereby the drill t will have entered the work and backed out to the position shown in full lines in Fig. 11 (corresponding to position 0 on the intermediate portion of the diagram, Fig. 10), before. the

/counter-boring tool has reached the position of the working end of the tool t when farthest into the work, as illustrated by the broken lines in alignment with the tool t.

I claim 1. In a metal cutting machine, a frame, a plurality of tool driving and supporting carit'iiages slidably mounted on the frame,-cyliners fixed to the frame and operating in respective cylinders to advance and retract the carriages toward and from their operating positions, pumps mounted on respective carriages, connections between the pumps and their respective cylinders, valve control mechanisms mounted on respective carriages to control fixed to respective carriages, pistons neously, and motors on respective carriages to drive respective pumps and tools.

2. In a metal cutting machine, a frame, a

plurality of-tool driving and supporting carriages slidably mounted on the frame,cylinders fixed to respective carriages, pistons fixed to the frame and operating in respective cylinders to advance and retract the carriages toward and from their operating positions, variable displacement fluid pumps mounted on respective carriages and directly connected to opposite ends of their respective cylinders, a valve control mechanism for each pump mounted on respective carrlages to control the rate and direction of flow of fluid I in respective pumps, means interconnecting each of the control mechanisms to cause their respective pumps to initiate the movement of each head simultaneously, each of said controls comprising a fluid valve and an independent pump therefor mounted in said carriage, and a motor mounted on each carriageand drivingly connected to operate the control pump the carriage operating pump and drive the tools. v 3-. In a metal cutting machine, a main frame, a tool driving and supporting carriage slidably mounted on the main frame,

a cylindersecured to the carriage, a piston secured to the main frame and operating in said cylinder to, advance and withdraw the carriage from the work, said carriage including a hdusing, a motor supported by said housing, a variable displacement pump within said housing, mechanism within the housing to control the displacement of the pump to vary the flow from the pump to the cylinder, a shaft drivingly connected to said motor, gearing connecting said shaft to said pump, tool spindles rotatably mounted in said housing and arranged to carry the metal cutting tools, gearing drivingly connecting said shaft to said spindles and means acting on said displacement control mechanism to vary the speed of travel of said carriage relative to the frame while maintaining the driving connections between the motor and the pump and the motor and the spindles.

4. In a metal cutting machine, a main frame, a tool driving and supportingvcarriage slidably mounted on the main frame, a cylinder secured to the carriage, a piston secured to the main frame and operatingin said cylinder to advance and withdraw the carriage from the work, said carriage including a housing, a motor supported by said housing, a variable displacement pump within said housing and connected tovopposite ends of said cylinder, fluid operated mechanism within the housing to control the displacement of the pump to vary the rate and wagers direction of flg w. through the pump to the cylinder, :1 second pump arranged to supply fluid pressure to said control means, a shaft drivingly"connected'to said motor, gearing connecting said shaft to both of said pumps, tool spindles rotatably mounted in-said housing and arranged to carry metal cutting tools and gearing driving'ly connecting said shaftto said spindles and whereby the speedand direction of travel of said carriage relative to the frame may be varied while maintaining the driving connections between the motor and both of said pumps and the tools.

5. In a metal cutting machine, a main frame, a carriage reciprocably mounted on said frame, a metal cutting tool rotatably mounted on said carriage, an electric motor mounted on said carriage and operatively connected to rotate the tool, a pressure pump mounted on said carriage, means drivingly connecting the motor to the pump whereby the pump and toolare driven simultaneously by the motor, hydraulically responsive means connected to said carriageand to the frame and adapted toreciprocate said carriage, and

a hydraulic connection between said means and said pump.

6. In a metal cutting machine, a main frame, a carriage reciprocably mounted on said frame, a metal cutting tool rotatably mounted on said carriage, an electric motor mounted on said carriage and operatively connected to rotate the tool, a pressure pump mounted on said carriage, means drivingly connecting the motor to the pump whereby the pump and tool are driven s1multaneously;.,- by the motor, hydraulically responsive means connected to said carriage and to the frame and adapted to reciprocate said carriage, a hydraulic connection between said means and said pump, control means carried by the carriage and operated by ele-- ments carried bythe frame, and a connecto said frame, a cutting tool rotatably carried tionbetween the pump and the control means.

7. In a metal cutting machine, a main frame, a carriage reciprocably mounted on said frame, a cutting tool rotatably mounted in said carriage, an electric motor mounted on said carriage and operatively .connected to rotate said tool, a pressure pump mounted on said carriage, means connecting' said motor to drive said pump, a hydraulically responsive means connected to said frame and the carriage to reciprocate said carriage and interposed between the pump and said hy-' draulically responsive means, a valve mounted on said carriage to control the displacement of said pump, and means stationarily mounted on the main frame to operate said valve when said hydraulically responsive means reciprocates said carriage.

8. In a metal cutting machine, a main frame, a carriage reciprocably mounted on by said carriage, a pump mounted on said carriage, a motor for driving the pump, means drivingly connecting the motor to the pump and to the tool and, wherein the axis of the motor and the tool and the pump are said frame comprising a housing, a cutting tool rotatably mounted on said carriage at one end of sa d housing, amotor mounted on said carriage at the opposite end of said hous ing and operatively connected to rotate said tool, a pump mounted on said carriage within a secondary housingv comprising a fluid reservoir, means disposed within the firstnamed housing and connecting said motor to drive said pump, of hydraulically responsive mea ns disposed between the first-named housing and said frame to reciprocate said carriage, a valve mounted on said carriage and within said housings and arranged to control the displacement of said pump, and means carried by the main frame to control said valve.

10. In a metal cutting machine, a main frame, a carriage reciprocably mounted on said frame, a cutting tool rotatably carried bysaid carriage, a pump mounted on said carriage, means including an intermediate shaft "drivingly connecting the motor to the pump and to the tool, said shaft extending parallel to the shaft of-the pump, hydraulically responsive means powered by the pump to reciprocate the carriage and a hydraulic connection on the carriage and extending through the carriage to connect between the pumpto said hydraulically responsive means.

hydraulically responsive piston and cylinder operatively interposed between the said frame and the. carriage,a pump mounted on the carriage between the motor and said tool spindle, a shaft rotatably supported by the carriage to extend alongside of said pump, speed reduction means connecting. the shaft of the motor and said shaft, a driving connection between said shaft and the pump, a gear drive connecting said shaft to said tool spindle, and a hydraulic connection on the carriage extending between said pump and said piston and cylinder.

12. In a metal cutting machine, a main frame, a carriage mounted for automatic reciprocation upon the frame, a metal cutting being supported by a common housing com- L prising part of the carriage, a driving connection disposed within the housing .and-

operatively extending between said shaft and the pump, a hydraulic connection on the carriage extending through the housing to connect s'aid pump and said piston and cylinder, a valve in said hydraulic connection and valve operating means mounted upon one side of the housing for causing the valve to operate whereby pressure from the pump will cause one complete cycle of reciprocations of the carriage automatically.

13. In a metal cutting machine, a main frame, a carriage reciprocably mounted on the frame, a metal cutting tool spindle rotatably mounted at one end of the carriage, an electric motor mounted on the opposite end of the carriage, a housing structure comprising part of the carriage and disposed between said spindle and said motor, a hydraulic cylinder connected to the underside of the housing, a piston within the cylinder and connected to the said frame, a pump mounted on the carriage within the housing, a shaft rotatably supported within the housing to extend alongside of said pump, speed reduction means connecting the shaft of the motor andsaid shaft, a driving connection between said shaft and the pump, a gear drive connecting said shaft to sa idto'ol spindle, and a hydraulic connection extending through the housing connecting said pump to said cylinder. 14. In a metal cutting machinefia main frame, a carriage reciprocably mounted 'on said main frame, a cutting tool rotatably mounted in and carried by the carriage, fluid pumping means,

pumping means mounted, on the carriage,

said pumping means being"adapted to deliver a liquid at high speed and low pressure and at low speed and high pressure, an-ele'ctric,

motor mounted on said carriage and drivmgly connected through means on the car'- riage to rotate said tool, means on the carrisaid motor to drive said a hydraulically responsive means connected to sa1d frame am; to the age connecting carriage to impart fast and slow reciprocating movements to said carriage, said pumping means serving to deliver high pressure and slow, movement to said hydraulically responsive means, eration of said tool and greatly increased volume of said liquid at low pressure during the 'major reciprocating movements of the carriage,"a valve mechanism mounted on said frame, and to be reciprocated at varying speeds, a plurality of cutting tools rotatably mounted in" and {carried .by the carriage, a fluid pump ing means mounted on the carriage, said fluid pumping means being adapt: ed to deliver a liquid'at high speed and low pressure and at low speed and high pressure, an electric motor mounted on said carriage and drivingly connected through means on the carriage to rotate said tools, means on the carriage for connecting said motor to drive said pumping means at a constant speed, a hydraulically resistant piston connected to said frame and a cylinder cooperating with the piston and fixed to the carriage to reciprocate said carriage, said pumping means serving to deliver high pressure and slow relative movement to the piston and cylinder only during the cutting operations of said tools, and low pressure and greatly increased movement during the major reciprocating movements of the tool, a valve mechanism mounted on said carr? :tge and interposed between the pump and said hydraulically responsive means to control the pressure and displacement ofsaid pump andmeans sta- In testimony whereof, I hereunto aflix my signature.

' WALTER-F. BABCOCK.

only during the cutting 'op- DISOLAI ME R 1',904,975.Walter F. Babcock, Detroit, Mich. METAL Cn'r'rmo MACHINE hm).

CoN'rnoL'SYsTEM THEREFOR. Patent dated April 18 1933; Disclaimer filed Angust 7', 1933, by the assignee, The Foote-Burt Company. v Hereby enters this disclaimer by diselaiming from claims 5, 6, 7, 8, and Many nletal eutt 'machine, when such a machine does not have a. pump or--pumpmg means osed a. secondary housing upon the carriage thereof. [Oficial Gazette August 2.9, 1933.] 

